LM4132BMFX-3.3

Voltage Reference Overview

The LM4132BMFX-3.3 is a precision low dropout voltage reference manufactured by Texas Instruments, housed in a SOT-23 package. It provides a fixed output voltage of 3.3 V with an initial accuracy of ±0.1%. The device operates within a temperature range of -40°C to +125°C and features a maximum supply current of 60 µA (100 µA max over temperature). It supports a maximum load current of 20 mA and includes an enable pin for shutdown mode. The input voltage range extends from VREF + 400 mV to 5.5 V.

Voltage Reference Feature Summary

• Utilizes EEPROM registers for curvature correction and package-level programming to maintain high accuracy.
• Features an enable pin that allows for a low-power shutdown mode.
• Capable of delivering up to 20 mA of output current without requiring an output capacitor or buffer amplifier.

Voltage Reference Applications

• Instrumentation and process control systems
• Data acquisition systems
• Portable battery-powered equipment
• Precision regulators

Voltage Reference Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free status and confirms compliance with RoHS directives as per manufacturer documentation. Ensure the ordering code matches the required B grade accuracy and 3.3 V output specification. Confirm the SOT-23-5 package variant aligns with PCB footprint requirements before finalizing procurement orders.

Voltage Reference Selection Notes

Select this component when a fixed 3.3 V reference with ±0.1% initial accuracy is required in a space-constrained SOT-23 package. It is suitable for applications needing low quiescent current and high precision. Consider the B grade specifications if tighter tolerance than the E grade is necessary but full A grade cost is not justified.

Voltage Reference Part Context

This part belongs to the LM4132 family of precision voltage references designed using CMOS technology with EEPROM-based trimming. The family offers various voltage options and grades (A through E) to balance performance and cost. The LM4132 series is noted for its ability to perform comparably to laser-trimmed bipolar references while maintaining low power consumption.

Voltage Reference FAQ

Does the LM4132BMFX-3.3 require an output capacitor for stability?

No, the LM4132 does not require an output capacitor or buffer amplifier for stable operation.

What is the function of the EN pin on the LM4132?

The EN pin is an enable input that allows the device to enter a shutdown mode with reduced supply current when activated.